Oncogene:FOXA1的高甲基化和 PTEN等位基因的缺失能够促进鳞状分化和膀胱癌异质性

2019-11-06 AlexYang MedSci原创

膀胱癌中的瘤内异质性是进行准确分子分型和良好治疗效果的障碍。然而,肿瘤异质性的个体细胞和机制贡献是有争议的。最近,有研究人员调查了FOXA1和PTEN去激活在膀胱癌中的潜在机制,并探究了对肿瘤异质性的贡献情况。这些分析在去激活的FOXA1和PTEN中间型和腔型小鼠尿路上皮细胞中进行。研究发现,FOXA1和PTEN的去激活和表达减弱在人类疾病中广泛存在,且FOXA1和PTEN在等位基因缺失和位点特异

膀胱癌中的瘤内异质性是进行准确分子分型和良好治疗效果的障碍。然而,肿瘤异质性的个体细胞和机制贡献是有争议的。

最近,有研究人员调查了FOXA1和PTEN去激活在膀胱癌中的潜在机制,并探究了对肿瘤异质性的贡献情况。这些分析在去激活的FOXA1和PTEN中间型和腔型小鼠尿路上皮细胞中进行。研究发现,FOXA1和PTEN的去激活和表达减弱在人类疾病中广泛存在,且FOXA1和PTEN在等位基因缺失和位点特异性DNA高甲基化中分别表达下调。在中间型和腔型小鼠尿路上皮细胞中Foxa1和Pten条件去激活能够导致膀胱癌的发展,并表现出了鳞状特征以及对膀胱特异性致癌物质敏感性的增强。另外,FOXA1在基底膀胱癌细胞系中高度甲基化,并且可以通过DNA甲基化转移酶抑制剂逆转。

最后,通过整合人类相关和体内研究,研究人员确定了PTEN丧失和FOXA1表观沉默在人了异质性疾病中的关键作用,并展现了小鼠中驱使鳞状分化的腔型和中间型细胞的遗传靶标。

原始出处:

Vasty Osei-Amponsa, Jenna M. Buckwalter, Lauren Shuman et al. Hypermethylation of FOXA1 and allelic loss of PTEN drive squamous differentiation and promote heterogeneity in bladder cancer. Oncogene. 21 Oct 2019

本文系梅斯医学(MedSci)原创编译整理,转载需授权!

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    2020-01-29 cy0324
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    2019-11-08 智智灵药
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    2019-11-08 zsyan
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    2019-11-06 留走人康

    膀胱癌真怪,明明是免疫敏感性肿瘤,为什么PD-1治疗效果不好呢?难道靶点不对?将来CD47会不会有效

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